level calculation

what is the hight of the wet leg? what is the hight of the maximum level to be measured?

Can you post a drawing? I'm having difficulty with your description.

What is N1 and N2? Are these the height of the taps from the transmitter (which puts N2 below the transmitter)?

You are going to have a suppressed range because of the wet legs.

First, take the difference in height between the two legs, and find that pressure. Apply this pressure to the low side of the transmitter, and this will be your zero percent (x); 4 mA.

Next, find the pressure that will be produced from the increasing level in the tank (y). Take the difference between this pressure and the pressure used to find your zero percent (x - y = z). The answer will be your 100 percent (z); 20 mA; again applying this pressure to the low side of your transmitter during calibration.

Here's a formula if you need one:

Level Calibration Range

Looks to me as if you're asking CR4 members to do your schoolwork, given the number and nature of questions you've posted here lately. From this and a rash other threads you've just started:

• hi, is there any formula or calculation for hydrotest pressure. Can any one can help?
• Find the weight of various volumes containing a liquid having an SP of 7.38,
• hi, there. how to calculate milivolt to deg C, deg C to milivolt, any one can help please.
• hi, there. how to calculate RTD to deg C , deg C to RTD, any one can help please.
• the weight of a body in air 17 lb and submerged in water 3 lb. what is the volume and specific weight of the body?
• An ultrasonic transmitter and receiver are placed 10.5 ft above the surface of a liquid. How long will the sound waves take to travel from the transmitter to the receiver? Assume the velocity of sound waves is 340 m/s

Do your own work, son. It's the only way you'll learn the material.

-europium

Glad someone else was thinking the same thing as me......

Sorry, Vulcan. My reply was intended for RonRon. Prolly obvious, but I thought I'd clarify...

No problemo.

I kinda deduced that when I read it.

I didn't see it as a homework question. I've had several new guys come in recently and, while they seemed bright young lads, they didn't know much. I've been giving little classroom sessions to get them up to speed.

It seems that colleges don't teach much in the ways of practical things anymore. A few of the kids picked up the concept of level calibration very easily but most needed a few more details to get the information to sink in.

Taken in isolation, I would see RonRon's "level" question in that light as well - a legitimate engineering question. No problem there, and I would have been happy to field the question as such. But RonRon's rash of posts taken together sure seem to me to be schoolwork questions that RonRon is trying to get someone else (us!) to answer for him/her. I don't mind helping someone with their schoolwork, provided they identify it as such and provided the student demonstrates a willingness to do the bulk of the work work him/herself. I see none of this. A glance over RonRon's other posts/threads suggests to me that RonRon does this sort of thing habitually.

This thread is the only one left from Ronron that has not been reported as homework and shut down. It is "border-line" homework which could be legit.